I bought this game in my local Tesco store in Evesham, Worcestershire for only £24 last night. I am not sure about availability but Evesham definitely had 3 or 4 copies left on the stand.
In Mario & Sonic at the Olympic Games, players compete in events that take place in environments based on the official venues of the Beijing 2008 Olympic Games. Using a supporting cast of characters from the amazing worlds of both Mario and Sonic, gamers can compete as or against a range of lovable personalities including Mario, Sonic, Luigi, Knuckles, Yoshi, Tails and more. Innovative usage of the Wii and DS control systems to maneuver a favorite character allow players to race the likes of Mario and Sonic down the 100m track, engage in exhilarating rallies in table tennis and churn water in a swimming heat, all while competing for the much sought after gold medal.